diff --git a/src/Relay.h b/src/Relay.h
index ca357f2..e65a458 100644
--- a/src/Relay.h
+++ b/src/Relay.h
@@ -18,31 +18,39 @@ public:
 
   void setup() override {
     Output::setup();
-    Output::setName(configRead(String("relayName") + index, nameFallback));
-    Output::setInitial(configRead(String("relayInitial") + index, INITIAL_OFF));
-    Output::setOnMillis(configRead(String("relayOnMillis") + index, 0L));
-    Output::setOffMillis(configRead(String("relayOffMillis") + index, 0L));
+    Output::setName(configRead(path("name"), nameFallback));
+    Output::setInitial(configRead(path("initial"), INITIAL_OFF));
+    Output::setOnMillis(configRead(path("onMillis"), 0L));
+    Output::setOffMillis(configRead(path("offMillis"), 0L));
     _applyInitial();
   }
 
   void setName(const String &value) override {
     Output::setName(value);
-    configWrite(String("relayName") + index, nameFallback, value);
+    configWrite(path("name"), nameFallback, value, false);
   }
 
   void setInitial(const Initial value) override {
     Output::setInitial(value);
-    configWrite(String("relayInitial") + index, INITIAL_OFF, value);
+    configWrite(path("initial"), INITIAL_OFF, value);
   }
 
   void setOnMillis(const unsigned long value) override {
     Output::setOnMillis(value);
-    configWrite(String("relayOnMillis") + index, 0L, value);
+    configWrite(path("onMillis"), 0L, value);
   }
 
   void setOffMillis(const unsigned long value) override {
     Output::setOffMillis(value);
-    configWrite(String("relayOffMillis") + index, 0L, value);
+    configWrite(path("offMillis"), 0L, value);
+  }
+
+private:
+
+  String path(const char *name) const {
+    char path[64];
+    snprintf(path, sizeof(path), "/relay%d/%s", index, name);
+    return String(path);
   }
 
 };
diff --git a/src/config.cpp b/src/config.cpp
index 9ca318c..7e392c7 100644
--- a/src/config.cpp
+++ b/src/config.cpp
@@ -1,83 +1,141 @@
 #include "config.h"
 
 #include <LittleFS.h>
-#include <sys/stat.h>
+
+enum CONFIG_LOG {
+  CONFIG_LOG_FALLBACK,
+  CONFIG_LOG_READ,
+  CONFIG_LOG_UNCHANGED,
+  CONFIG_LOG_WRITE,
+};
+
+void listDir(const String &path, const String &indent) {
+  auto dir = LittleFS.open(path, "r");
+  if (!dir || !dir.isDirectory()) {
+    return;
+  }
+  while (true) {
+    File child = dir.openNextFile();
+    if (!child) {
+      break;
+    }
+    if (child.isDirectory()) {
+      Serial.printf("%s[D] [    ] %s\n", indent.c_str(), child.name());
+      listDir(child.path(), indent + "  ");
+    }
+    child.close();
+  }
+  dir.rewindDirectory();
+  while (true) {
+    File child = dir.openNextFile();
+    if (!child) {
+      break;
+    }
+    if (!child.isDirectory()) {
+      Serial.printf("%s[F] [%4d] %s\n", indent.c_str(), child.size(), child.name());
+    }
+    child.close();
+  }
+  dir.close();
+}
 
 void configSetup() {
-  LittleFS.begin();
+  LittleFS.begin(true);
+  Serial.println("Filesystem-content:");
+  listDir("/", "");
 }
 
-File configOpen(const String &name, const char *mode) {
-  char path[64];
-  snprintf(path, sizeof(path), "/%s", name.c_str());
-  return LittleFS.open(path, mode);
+File configOpen(const String &path, const bool write) {
+  if (!write && !LittleFS.exists(path)) {
+    return {};
+  }
+  return LittleFS.open(path, write ? "w" : "r", write);
 }
 
-long configRead(const String &name, const long fallback) {
-  if (auto file = configOpen(name, "r")) {
+void doLog(const String &path, const String &value, const bool isPassword, const CONFIG_LOG type, const bool enable) {
+  if (!enable) {
+    return;
+  }
+  Serial.printf(
+    "[CONFIG] %-20s = %-30s [%s]\n",
+    path.c_str(),
+    isPassword ? "*" : value.c_str(),
+    type == CONFIG_LOG_FALLBACK ? "FALLBACK" : type == CONFIG_LOG_READ ? "READ" : type == CONFIG_LOG_UNCHANGED ? "UNCHANGED" : type == CONFIG_LOG_WRITE ? "WRITE" : ""
+  );
+}
+
+long configRead(const String &path, const long fallback, const bool log) {
+  if (auto file = configOpen(path, false)) {
     const auto content = file.readString();
     file.close();
-    return content.toInt();
+    const auto value = content.toInt();
+    doLog(path, String(value), false, CONFIG_LOG_READ, log);
+    return value;
   }
+  doLog(path, String(fallback), false, CONFIG_LOG_FALLBACK, log);
   return fallback;
 }
 
-bool configWrite(const String &name, const long fallback, const long value) {
-  if (configRead(name, fallback) == value) {
+bool configWrite(const String &path, const long fallback, const long value) {
+  if (configRead(path, fallback, false) == value) {
+    doLog(path, String(value), false, CONFIG_LOG_UNCHANGED, true);
     return false;
   }
-  Serial.printf("[CONFIG] \"%s\" = \"%ld\"\n", name.c_str(), value);
-  if (auto file = configOpen(name, "w")) {
+  if (auto file = configOpen(path, true)) {
     const auto content = String(value);
     file.write(reinterpret_cast<const uint8_t *>(content.c_str()), content.length());
     file.close();
+    doLog(path, String(value), false, CONFIG_LOG_WRITE, true);
     return true;
   }
   return false;
 }
 
-bool configRead(const String &name, const bool fallback) {
-  return configRead(name, fallback ? 1L : 0L) > 0;
+bool configRead(const String &path, const bool fallback) {
+  return configRead(path, fallback ? 1L : 0L) > 0;
 }
 
-bool configWrite(const String &name, const bool fallback, const bool value) {
-  return configWrite(name, fallback ? 1L : 0L, value ? 1L : 0L);
+bool configWrite(const String &path, const bool fallback, const bool value) {
+  return configWrite(path, fallback ? 1L : 0L, value ? 1L : 0L);
 }
 
-String configRead(const String &name, const char *fallback) {
-  return configRead(name, String(fallback));
+String configRead(const String &path, const char *fallback) {
+  return configRead(path, String(fallback));
 }
 
-bool configWrite(const String &name, const char *fallback, const char *value) {
-  return configWrite(name, String(fallback), String(value));
+bool configWrite(const String &path, const char *fallback, const char *value) {
+  return configWrite(path, String(fallback), String(value), false);
 }
 
-String configRead(const String &name, const String &fallback) {
-  if (auto file = configOpen(name, "r")) {
-    const auto content = file.readString();
+String configRead(const String &path, const String &fallback, const bool log, const bool isPassword) {
+  if (auto file = configOpen(path, false)) {
+    const auto value = file.readString();
     file.close();
-    return content;
+    doLog(path, value.c_str(), isPassword, CONFIG_LOG_READ, log);
+    return value;
   }
+  doLog(path, fallback.c_str(), isPassword, CONFIG_LOG_FALLBACK, log);
   return fallback;
 }
 
-bool configWrite(const String &name, const String &fallback, const String &value) {
-  if (configRead(name, fallback) == value) {
+bool configWrite(const String &path, const String &fallback, const String &value, const bool isPassword) {
+  if (configRead(path, fallback, false) == value) {
+    doLog(path, value.c_str(), isPassword, CONFIG_LOG_UNCHANGED, true);
     return false;
   }
-  Serial.printf("[CONFIG] \"%s\" = \"%s\"\n", name.c_str(), value.c_str());
-  if (auto file = configOpen(name, "w")) {
+  if (auto file = configOpen(path, true)) {
     file.write(reinterpret_cast<const uint8_t *>(value.c_str()), value.length());
     file.close();
+    doLog(path, value.c_str(), isPassword, CONFIG_LOG_WRITE, true);
     return true;
   }
   return false;
 }
 
-Initial configRead(const String &name, const Initial &fallback) {
-  return stringToInitial(configRead(name, initialToString(fallback)));
+Initial configRead(const String &path, const Initial &fallback) {
+  return stringToInitial(configRead(path, initialToString(fallback)));
 }
 
-bool configWrite(const String &name, const Initial &fallback, const Initial &value) {
-  return configWrite(name, initialToString(fallback), initialToString(value));
+bool configWrite(const String &path, const Initial &fallback, const Initial &value) {
+  return configWrite(path, initialToString(fallback), initialToString(value));
 }
diff --git a/src/config.h b/src/config.h
index 268f50b..1894a18 100644
--- a/src/config.h
+++ b/src/config.h
@@ -7,24 +7,24 @@
 
 void configSetup();
 
-long configRead(const String &name, long fallback);
+long configRead(const String &path, long fallback, bool log = true);
 
-bool configWrite(const String &name, long fallback, long value);
+bool configWrite(const String &path, long fallback, long value);
 
-bool configRead(const String &name, bool fallback);
+bool configRead(const String &path, bool fallback);
 
-bool configWrite(const String &name, bool fallback, bool value);
+bool configWrite(const String &path, bool fallback, bool value);
 
-String configRead(const String &name, const char *fallback);
+String configRead(const String &path, const char *fallback);
 
-bool configWrite(const String &name, const char *fallback, const char *value);
+bool configWrite(const String &path, const char *fallback, const char *value);
 
-String configRead(const String &name, const String &fallback);
+String configRead(const String &path, const String &fallback, bool log = true, bool isPassword = false);
 
-bool configWrite(const String &name, const String &fallback, const String &value);
+bool configWrite(const String &path, const String &fallback, const String &value, bool isPassword);
 
-Initial configRead(const String &name, const Initial &fallback);
+Initial configRead(const String &path, const Initial &fallback);
 
-bool configWrite(const String &name, const Initial &fallback, const Initial &value);
+bool configWrite(const String &path, const Initial &fallback, const Initial &value);
 
 #endif
diff --git a/src/wifi.cpp b/src/wifi.cpp
index 706dfe1..f76b0f3 100644
--- a/src/wifi.cpp
+++ b/src/wifi.cpp
@@ -3,9 +3,9 @@
 #include "http.h"
 #include "io.h"
 
-#define CONFIG_HOSTNAME         "hostname"
-#define CONFIG_WIFI_SSID        "wifiSSID"
-#define CONFIG_WIFI_PASSWORD    "wifiPassword"
+#define CONFIG_HOSTNAME         "/wifi/hostname"
+#define CONFIG_WIFI_SSID        "/wifi/ssid"
+#define CONFIG_WIFI_PASSWORD    "/wifi/password"
 
 #define DEFAULT_HOSTNAME        "PatrixSonoff4ChPro"
 #define DEFAULT_WIFI_SSID       "HappyNet"
@@ -28,7 +28,7 @@ void wifiConnect() {
 
   const auto hostname = configRead(CONFIG_HOSTNAME, DEFAULT_HOSTNAME);
   const auto wifiSSID = configRead(CONFIG_WIFI_SSID, DEFAULT_WIFI_SSID);
-  const auto wifiPass = configRead(CONFIG_WIFI_PASSWORD, DEFAULT_WIFI_PASSWORD);
+  const auto wifiPass = configRead(CONFIG_WIFI_PASSWORD, DEFAULT_WIFI_PASSWORD, true, true);
 
   WiFi.hostname(hostname);
   WiFi.begin(wifiSSID.c_str(), wifiPass.c_str());
@@ -66,19 +66,15 @@ void wifiLoop() {
 void wifiChangeHostname(const char *hostname) {
   if (configWrite(CONFIG_HOSTNAME, DEFAULT_HOSTNAME, hostname)) {
     WiFi.setHostname(hostname);
-    Serial.printf("[WiFi] hostname: %s\n", hostname);
   }
 }
 
 void wifiChangeSSID(const char *ssid) {
-  if (configWrite(CONFIG_WIFI_SSID, DEFAULT_WIFI_SSID, ssid)) {
-    Serial.printf("[WiFi] SSID: %s\n", ssid);
-  }
+  configWrite(CONFIG_WIFI_SSID, DEFAULT_WIFI_SSID, ssid);
 }
 
 void wifiChangePassword(const char *password) {
-  configWrite(CONFIG_WIFI_PASSWORD, DEFAULT_WIFI_PASSWORD, password);
-  Serial.printf("[WiFi] password: ***");
+  configWrite(CONFIG_WIFI_PASSWORD, DEFAULT_WIFI_PASSWORD, password, true);
 }
 
 void wifiSetup() {